fixed long time for swapBuffers by turning off vsync

bbiwarg/Graphics/OutputWindow.cs

@@ -54,6 +54,8 @@ namespace bbiwarg.Graphics
                 Keyboard.KeyDown += HandleKeyDown;
                 Logger.log("video controls enabled (space=pause, right=nextFrame, left=previousFrame)", LogSubject.VideoControls);
             }
+
+            VSync = VSyncMode.Off;
         }
 
         protected override void OnResize(EventArgs e)